low budget, yeah, and some of the special effects are a bit dated by modern standards, stop-motion was still the state of the art for monsters when this film was made, and they did a darn good job with it. Audio track is a bit odd, found out the audio was added after filming (IMDB). Big plus, though, though, is Fritz Leiber is in it. Also, the guy who played Jim, Frank Bonner, went on to be a regular in WKTP in Cincinnati (I think I've seen a couple of episodes at some point).